https://springernature.figshare.com/articles/journal_contribution/Additional_file_3_of_The_association_between_social_connectedness_and_euthanasia_and_assisted_suicide_and_related_constructs_systematic_review/26707358?backTo=%2Fcollections%2FThe_association_between_social_connectedness_and_euthanasia_and_assisted_suicide_and_related_constructs_systematic_review%2F7185698&file=48549449